Dr. Timothy O'brien, MD
Dr. Timothy O'brien is a board-certified orthopedic surgeon practicing in Bozeman, Montana. A Medicare provider since 2005, Dr. O'brien has performed 36 Medicare-verified knee replacements (#20 in Montana) and 16 hip replacements, for a combined total of 52 procedures.
In Montana, Dr. O'brien performs below average in knee (36 vs 58 avg), below average in hip (16 vs 54 avg).
Dr. O'brien's reported Medicare volume is split between knee replacements (36 cases) and hip replacements (16 cases).
Bozeman is home to 6 orthopedic surgeons in the current Medicare dataset. Patients in the Bozeman area can compare surgeon volume and procedure specialization to find the right fit for their joint replacement needs.
Medicare records for Dr. O'brien extend back to 2013, covering 11 years of data. Over that period, recorded procedure volume increased from 15 to 52 in the most recent data, a 247% increase. This sustained growth reflects an expanding joint replacement practice.
Among 6,720 knee replacement surgeons tracked nationally, Dr. O'brien's 36 verified procedures is near the national average of 45.
Verified Medicare Cases
How is this estimated?
Medicare Part B fee-for-service claims represent approximately 33–37% of all joint replacements performed nationally (source: CMS data, AJRR). This range estimates the surgeon's total practice volume across all payers. The verified Medicare count above is the definitive, audited figure.
How Dr. O'brien Compares
Procedure volume compared to the Montana state average.
Contact & Location
Bozeman, MT 59718
Verified Case Volume Trends (2013-Current)
Volume Trend Analysis
Dr. O'brien's Medicare-recorded procedure volume has trended upward over 11 years, increasing 247% from 15 procedures in 2013 to 52 in the most recent data.
Hospital Affiliations & Quality
Quality ratings and complication rates are hospital-level metrics from CMS Hospital Compare and do not reflect individual surgeon performance. Star ratings updated quarterly. Complication data covers a rolling 3-year period.
Patient Resources: Preparing for Knee Replacement
If you are considering knee replacement surgery, these evidence-based guides can help you prepare and recover:
An overview of current surgical approaches including robotic-assisted and minimally invasive techniques, implant options, and expected outcomes.
Questions to Ask Your Surgeon Before Joint ReplacementA practical checklist of questions covering experience, technique, hospital choice, and recovery expectations to discuss during your surgical consultation.
Pain Management After Joint ReplacementA comprehensive guide to managing post-surgical pain through medication, physical therapy, cold therapy, and non-pharmacological strategies.
Outpatient Joint Replacement: A Medicare GuideHow outpatient joint replacement works under Medicare, including eligibility criteria, cost differences, and what to expect with same-day discharge.
Knee Replacement Recovery Overview
Recovery timelines vary by patient, but here is a general overview of what to expect after knee replacement surgery:
Individual recovery varies based on overall health, age, and adherence to physical therapy. View full knee replacement recovery guide and product recommendations
Frequently Asked Questions About Dr. O'brien
How does Dr. O'brien's procedure volume compare to other Montana surgeons?
Dr. O'brien has performed 52 Medicare-verified joint replacement procedures. The Montana average is 81 procedures per surgeon. Medicare data captures roughly one-third of all joint replacements, so total volume may be higher. Dr. O'brien ranks #23 out of 45 orthopedic surgeons in Montana.
What types of joint replacement does Dr. O'brien perform?
Dr. O'brien's Medicare data shows procedures in knee replacement (36 cases) and hip replacement (16 cases).
How experienced is Dr. O'brien with knee replacement surgery?
Dr. O'brien ranks #20 in Montana for knee replacement with 36 Medicare-verified procedures. This high ranking among 45 state surgeons indicates significant experience with this specific procedure.
Are there other orthopedic surgeons near Dr. O'brien in Bozeman?
Yes. There are 6 orthopedic surgeons in Bozeman in the current Medicare dataset. Patients can compare procedure volumes and specializations to choose the surgeon who best fits their needs. Use the state page to view all Montana surgeons.
What does the Medicare data for Dr. O'brien represent?
The procedure counts shown are based on the most recent Medicare Part B fee-for-service claims data, published by the Centers for Medicare and Medicaid Services (CMS). This captures approximately 33–37% of all joint replacements performed nationally. Dr. O'brien's total practice volume — including private insurance and Medicare Advantage patients — is likely higher than the 52 procedures shown here.
Has Dr. O'brien's procedure volume changed over time?
Yes. Dr. O'brien's Medicare-recorded volume has increased from 15 procedures in 2013 to 52 in the most recent data, a 247% increase over 11 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 60 procedures in 2021.
Does Dr. O'brien perform more than one type of joint replacement?
Yes. Dr. O'brien's Medicare data shows procedures in knee replacement (36 cases), hip replacement (16 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. O'brien affiliated with?
According to CMS facility affiliation data, Dr. O'brien is affiliated with Bozeman Health Deaconess Regional Medical Center, Madison Valley Medical Center, Big Sky Medical Center.
How does Dr. O'brien compare to other orthopedic surgeons in Bozeman?
Among the 6 orthopedic surgeons in Bozeman, Dr. O'brien ranks #3 by total Medicare procedure volume. Dr. O'brien is among the highest-volume surgeons in Bozeman.
What are the quality ratings for hospitals where Dr. O'brien practices?
Bozeman Health Deaconess Regional Medical Center (4 out of 5 CMS stars, hip/knee complication rate similar to national average). These are hospital-level quality metrics from CMS Hospital Compare and do not reflect individual surgeon outcomes.
Other Orthopedic Surgeons in Bozeman, Montana
Dr. O'brien's 52 Medicare procedures are below the Bozeman average of 72. The table below compares verified procedure volumes for orthopedic surgeons practicing in Bozeman.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Dean Sukin | 175 | Hip, Knee |
| Dr. Martin Gelbke | 152 | Hip, Knee |
| Dr. Brandon Beamer | 23 | Knee, Shoulder |
| Dr. Mark Deibert | 16 | Knee |
| Dr. Peter Kelleher | 11 | Shoulder |
Patient Reviews & Ratings
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